// SPDX-License-Identifier: GPL-2.0-only
/*
 * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
 * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
 *
 * Copyright (C) 2017 ARM Limited or its affiliates.
 * Written by Gilad Ben-Yossef <gilad@benyossef.com>
 * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
 */
//#define DEBUG
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sm3.h>
#include <crypto/sm3_base.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>

const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
	0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F, 0x8e, 0x61, 0x19,
	0x48, 0x31, 0xE8, 0x1A, 0x8F, 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE,
	0xFB, 0x74, 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
};

static void print_buf(u8 *name, u8 *buf, u32 len)
{
	u32 i;

	pr_err("%s[0x%x]:\n", (char *)name, len);
	for (i = 0; i < len; i += 16) {
		pr_err("%08x: %02x %02x %02x %02x %02x %02x %02x %02x "
		       "%02x %02x %02x %02x %02x %02x %02x %02x\n",
		       i, buf[i + 0], buf[i + 1], buf[i + 2], buf[i + 3],
		       buf[i + 4], buf[i + 5], buf[i + 6], buf[i + 7],
		       buf[i + 8], buf[i + 9], buf[i + 10], buf[i + 11],
		       buf[i + 12], buf[i + 13], buf[i + 14], buf[i + 15]);
	}
}

static int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
			     unsigned int len)
{
	print_buf("update data", data, len);
	sm3_update(shash_desc_ctx(desc), data, len);
	return 0;
}

static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
{
	sm3_final(shash_desc_ctx(desc), out);
	return 0;
}

static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
			    unsigned int len, u8 *hash)
{
	struct sm3_state *sctx = shash_desc_ctx(desc);

	if (len)
		sm3_update(sctx, data, len);
	sm3_final(sctx, hash);
	return 0;
}

static struct shash_alg sm3_alg = { .digestsize = SM3_DIGEST_SIZE,
				    .init = sm3_base_init,
				    .update = crypto_sm3_update,
				    .final = crypto_sm3_final,
				    .finup = crypto_sm3_finup,
				    .descsize = sizeof(struct sm3_state),
				    .base = {
					    .cra_name = "sm3",
					    .cra_driver_name = "sm33-test",
					    .cra_priority = 200,
					    .cra_blocksize = SM3_BLOCK_SIZE,
					    .cra_module = THIS_MODULE,
				    } };

static int __init sm3_generic_mod_init(void)
{
	pr_info("info mesg ----- \n");
	pr_debug("debug msg ===== \n");
return 0;
	return crypto_register_shash(&sm3_alg);
}

static void __exit sm3_generic_mod_fini(void)
{
	

	 pr_info("info mesg -----22222  \n");
	         pr_debug("debug msg ===== 222\n");
	
		 return;
		 crypto_unregister_shash(&sm3_alg);
}

subsys_initcall(sm3_generic_mod_init);
module_exit(sm3_generic_mod_fini);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");

MODULE_ALIAS_CRYPTO("sm3");
MODULE_ALIAS_CRYPTO("sm3-generic");
